What's the difference between Normals and Face orientation?
The normals come out of the blue faces:



But if two blue faces are facing and close to each other, showing red faces to the outside, you may have the impression that normals come out from the red faces. Simply because normal indicators (blue segments) go through the mesh:

Here on left something close to what you show in your question and on right the back face is shifted so that we can see the normals doesn't come from the center of the red face anymore: